Exercise bar



FIG. 1 is a top plan view of an exercise bar showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view, the right side elevational view being the mirror image thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an exercise bar, as shown and described. 